I highly suggest the wikipedia entry [0] on regular expressions and their history; the concept goes back to at least a couple decades before Perl, which incorpo

I highly suggest the wikipedia entry [0] on regular expressions and their history; the concept goes back to at least a couple decades before Perl, which incorporated them via a c library written by Henry Spencer a couple years before Perl even existed. [0]: https://en.wikipedia.org/wiki/Regular_expression https://en.wikipedia.org/wiki/Regular_expression